HyperKewl Cooling Sport Vest - Enhance your performance in the Heat! - -KHAKI-LRG HyperKewl Cooling Sport Vest - Enhance your performance in the Heat! - -KHAKI-LRG Simple V-neck w/ zipper closure; work for a wide range of people and uses Can provide 5-10 hours of cooling relief per soaking Lightweight, easy to activate, and durable Comfortable, quilted nylon outer with HyperKewl Cooling Fabric inner, water-repellant nylon liner, and black cotton-poly elastic trim